The Mitsubishi 2.6-inch Touch Screen Model F943GOT-LWD belongs to the F920GOT series, which features integrated keypads and is designed for efficient human-machine interface (HMI) applications. This series offers a range of functional modules that enhance operational effectiveness and user interaction. The system interface is configured in English, ensuring clear and standardized communication for global users. The display is a 2.6-inch monochrome STN LCD, presenting information in blue and white, with a resolution of 128×64 pixels. It is designed for panel mounting, allowing seamless integration into control panels and industrial equipment. For communication, the unit is equipped with built-in ports: one RS-422 channel and one RS-232C channel, enabling reliable data exchange with various controllers and devices. The power supply requires DC 5V, ensuring low-energy operation.

A touch screen, as defined in this context, represents the interface or domain where human and machine interact—both in terms of information exchange and functional contact. This interaction includes not only physical contact such as points, lines, and surfaces but also extends to remote information transmission and control. The touch screen serves as a critical link in the human-machine system, facilitating direct and indirect interaction. The study and optimization of this interface fall under the discipline of safety ergonomics, a branch of safety engineering. Safety ergonomics provides the foundational principles for designing effective and safe human-machine interfaces. Further, practical solutions and measures are developed through related fields such as safety equipment engineering, safety management engineering, and safety system engineering, which together address specific methods, tools, and safety protocols to ensure a secure and efficient human-machine interaction environment.